Examine source code of Classic Fox

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#8c8c8c",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Classic Fox",
  "manifest_version": 2,
  "description": "This is my first persona! Check out the amazing wallpaper to match this persona <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/628d73830506d393871f3b10b89d628dfad3a8843e4dbe3eadf395f76a4bfe3c/http%3A//coalbiter.deviantart.com/art/Firefox-47201642\">http://coalbiter.deviantart.com/art/Firefox-47201642</a>"
}